What Brown saw and you can too

  title={What Brown saw and you can too},
  author={Philip Mark Pearle and Kenneth Bart and David E. Bilderback and Brian Collett and Dara Newman and Scott Samuels},
  journal={American Journal of Physics},
A discussion of Robert Brown’s original observations of particles ejected by pollen of the plant Clarkia pulchella undergoing what is now called Brownian motion is given. We consider the nature of those particles and how he misinterpreted the Airy disk of the smallest particles to be universal organic building blocks. Relevant qualitative and quantitative investigations with a modern microscope and with a “homemade” single lens microscope similar to Brown’s are presented. 
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XXVII. A brief account of microscopical observations made in the months of June, July and August 1827, on the particles contained in the pollen of plants; and on the general existence of active molecules in organic and inorganic bodies
m . j . B , / £ / BY ROBERT BROWN, F . R . S . , HON. M . R . & E . & R . I . ACAD., V . P . L . S . M E M B E R OF T H E R O Y A L A C A D E M Y OF S C I E N C E S OF S W E D E N , OF T H E R O Y A
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Journal kept by David Douglas during his Travels in North America, 1823–1827
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